1. What if some kind of quarantine camps (with a few tents, quarantine cells or sth) could be set up by the military in cities? Infected people could be put there, and by the end of the week, these places would especially be overrun by infected people turning into zombies there. Some soldiers could also be guarding these camps, I guess, giving you some kind of a protection when the chaos unfolds on day 6-7.

2. Would be cool if the zombies would have a small chance to spawn earlier, on 2nd or 3rd day (in a very small amount, though). The virus can kill and reanimate a bitten person in 2-3 days on default settings, so why not to apply such logic to some of the NPCs, I guess